Abstract SYMPHOS 2011

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NANOSTRUCTURE PROCESSING OF ADVANCED PHOSPHATE-BASED MATERIALS Materials & new products CP4 Jackie Y. Ying, Institute of Bioengineering and Nanotechnology 31 Biopolis Way, The Nanos, Singapore 138669 Nanostructured materials are of interest for a variety of applications. This talk describes the synthesis and properties of nanoparticulate materials. Nanoparticulate materials are made up of crystallites or particles of ~ 10 nm. They may be generated by various physical and chemical approaches with ultrahigh surface areas. We have prepared hydroxyapatite (Ca10(PO4)6(OH)2) nanoparticles of well-defined size and morphology for orthopedic implant applications. These nanocrystals facilitated the sintering of high-strength ceramics that are biocompatible to bone. They can also be combined with collagen to form bone grafts with a foam-like structure. In addition, nanocrystalline hydroxyapatite can be added to a polymer matrix to form a nanocomposite system for the controlled delivery of drugs and growth factors. For example, this system has provided the long-term, zero-order release of bone morphogenetic proteins to promote the healing of bone defects. Such a protein delivery system can also be combined with tissue engineering approaches to promote cartilage repair. Besides biomaterials, wet-chemical synthesis has led to the derivation of various phosphate materials with controlled porosity, crystalline orientation and particle size. These materials are of great interest for catalytic and energy storage applications. 12 Chris Earl KEMWORKS, USA Mohamed Belghiti Aloui OCP, Morocco PHOSPHORIC ACID TECHNOLOGY – HISTORY, EVOLUTION & FUTURE PERSPECTIVES Phosacid & fertilizer CP5 The first Wet Process Phosphoric Acid (WPA) plants were built between World War I & II. Plant size has increased from 25 t/d up to 2650 t/d. During the last forty years the wet process phosphoric acid industry has evolved under the influence of several major factors. Among the most important are: • Changes in phosphate quality • Greatly improved instrumentation and control • Improved materials of construction • Improved equipment & processes • Continuous increase of World demand for phosphate fertilizers This paper reviews those factors and their effect on the design and construction of modern phosphoric acid plants.
PHOSPHORUS, CROPS AND FOOD Agriculture & fertilization CP6 Dr. Donald L. Smith Plant Science Department, McGill University, Macdonald Campus Ste. Anne de Bellevue, Quebec, Canada H9X 3V9 Phosphorus is one of the three crop plant macronutrients contained in almost all fertilizers applied to agricultural lands. In plants large pools of phosphorus reside in DNA and RNA and in the phospholipids of membranes. A smaller pool is in ATP, where phosphorus plays a pivotal role in energy metabolism, including photosynthesis. Finally, phosphorylating and dephosphorylating proteins is a key mechanism for regulating protein conformation and enzyme activity, including the enzymes that regulate the cell cycle. When other growth requirements are not limiting crops have a very clear pattern of yield response to phosphorus fertilizer additions. This has been a very important contributing factor in increased global food production over the last six decades, and has allowed food production to keep pace with population growth during that time. However, application of large amounts of fertilizer phosphorus has also been an important contributor to agricultural pollution of water, contributing to eutrophication of rivers and lakes and even, in some cases, the development of “dead zones” in the open ocean. Agricultural phosphorus utilization has continued to expand in response to food requirements, however, there is now concern that we will reach “peak phosphorus” extraction sometime in the reasonably near future (perhaps only a few decades from now). If this is so it poses an important challenge to global food security. The thinking on peak phosphorus has paralleled that of peak oil and assumes a more or less bell shaped curve of extraction rate. Clearly, there are things that can be done to mitigate this, and phosphorus recycling is the most obvious. It may well be possible to integrate a biogas biofuel approach whereby municipal sewage treatment plants produce and sell biogas into energy markets and use the returns to extract and recycle phosphorus from the remaining sludge, selling this back to the agricultural sector. Food prices are already rising, in part because of higher energy prices and diversion of food material into biofuels. If we are going to avoid a potentially serious problem with world phosphorus and global food production levels we should begin broader and more integrated phosphorus management activities quite soon. 13
Page 2 and 3: Dear participants, On behalf of the
Page 4 and 5: EXTRACTION Mansour ASRI, Chercheur
Page 7: PLENARY LECTURES KEYNOTES MINING PH
Page 10 and 11: 10 L’INNOVATION TECHNOLOGIQUE DAN
Page 15 and 16: II - KEYNOTES 15
Page 17 and 18: LES MÉTHODES GÉOPHYSIQUES DE SUBS
Page 19 and 20: LES PHOSPHATES, LE LITHIUM ET LE ST
Page 21 and 22: material engineering concepts can b
Page 23 and 24: PHOSPHATE FERTILIZER PRODUCTION FRO
Page 25 and 26: ENVIRONMENTAL ISSUES The plants tha
Page 27: FOOD SECURITY AND THE ROLE OF FERTI
Page 30 and 31: 30 CONCEPTION ET RÉALISATION DES T
Page 32 and 33: LE SURFACE MINING: UN STANDARD INTE
Page 34 and 35: 34 LA STRATIGRAPHIE SEQUENTIELLE OU
Page 36 and 37: - Calcul de Ressources et Étude É
Page 38 and 39: 38 I
Page 40 and 41: 40 BENEFICIATION OF INDIAN LOW GRAD
Page 42 and 43: 42 Johan SIIRAK, AkzoNobel Surface
Page 44 and 45: Pour améliorer davantage la qualit
Page 46 and 47: Results REE elements recovery is ex
Page 48 and 49: 48 Marie VOGNSEN HALDOR TOPSOE A/S,
Page 50 and 51: This contribution gives an overview
Page 52 and 53: 52 Marten WALTERS KEMWorks Technolo
Page 54 and 55: PH-O-04 B. Messnaoui : Laboratoire
Page 56 and 57: at a considerable cost and the wate
Page 58 and 59: phosphate recovery will be determin
Page 60 and 61: The residence time of product in a
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62 IMPROVING PHOSPHORUS USE EFFICIE
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PH-O-16 Todd Hutchinson Director of
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Wet process phosphoric acid is fed
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68 Louis Paul Irwin, ArrMaz Custom
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70 FLUOROSILICIC ACID RECOVERY FROM
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VII - ENVIRONMENT & SUSTAINABLE DEV
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infiuence, 2 - average, 1 - less es
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downstream weir at the end of the p
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Pascale Compain Bertin Technologies
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WATER MANAGEMENT IN PHOSPHORIC ACID
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Suppression of plumes at the exhaus
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key pollutants including heavy meta
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VIII - INDUSTRIAL MANAGEMENT 87
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BELGHITI ALAOUI Mohamed OCP, MOROCC
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IX - MATERIALS & NEW PRODUCTS 91
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• La supervision des réparations
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FLUORINE RECOVERY TECHNOLOGY (INTRO
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HCl regeneration CaCl 2 + H 2 SO 4
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proposées comme la télomérisatio
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PRODUCTION OF GRANULAR AMMONIUM SUL
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X - POSTERS 103
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La série phosphatée étudiée s
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A SIMULATION PACKAGE FOR THE PHOSPH
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FABRICATION DES SUPERPHOSPHATES SSP
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LA SILICIFICATION DES PHOSPHATES MA
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ANALYSIS OF THE LIKELY SUPPLY SIDE
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Many REE are well known as luminesc
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OPERATION OF SURFACE MINER: RETROSP
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Harris Jack, President, VIP Interna
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D.Oussi OCP - MAROC PROJET DE RENOU
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XI - WORKSHOPS 123
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De par ses activités dans le secte
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Re-cyrstalllized structure of a cry
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Pour les professionnels : - les eng
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Pour des engrais de forme aplatie o
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Coatings The underlying principle o
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HOW IS BINDING ACHIEVED? Trace Elem
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MODÉLISATION THERMOCINÉTIQUE DES
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Garret Palmquist (MECS-DuPont), Sen
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The ideas emerged from looking at h
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PH-O-25 ...........................
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Abstract SYMPHOS 2011

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